Finding the Fourth Proportional to 2,334.81, 3,501.15 and 690.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,334.81 : 3,501.15 = 690.78 : x
2. Step 2: Convert to fraction form
   2,334.81/3,501.15 = 690.78/x
3. Step 3: Cross multiply
   2,334.81x = 3,501.15 × 690.78
4. Step 4: Simplify right side
   2,334.81x = 2,418,524.40
5. Step 5: Solve for x
   x = 2,418,524.40/2,334.81
6. Step 6: Final answer
   x = 1,035.85